WARNING: This page is about a different car, the 2018 BMW X4, 2017 BMW X4, 2016 BMW X4, and 2015 BMW X4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
(Hexagon screw M12x1.5x132 (4 units)) for screwing in the front axle support when removing and installing the front axle differential